Home / 71,511.56-98,685.63-39,680.39

Finding the Fourth Proportional to 71,511.56, 98,685.63 and 39,680.39

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Solution

The fourth proportional to 71,511.56, 98,685.63 and 39,680.39 is: 54,758.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,511.56 : 98,685.63 = 39,680.39 : x
  2. Step 2: Convert to fraction form
    71,511.56/98,685.63 = 39,680.39/x
  3. Step 3: Cross multiply
    71,511.56x = 98,685.63 × 39,680.39
  4. Step 4: Simplify right side
    71,511.56x = 3,915,883,792.37
  5. Step 5: Solve for x
    x = 3,915,883,792.37/71,511.56
  6. Step 6: Final answer
    x = 54,758.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.